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Finding the Fourth Proportional to 260,093.40, 390,140.10 and 135,418.20

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Solution

The fourth proportional to 260,093.40, 390,140.10 and 135,418.20 is: 203,127.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,093.40 : 390,140.10 = 135,418.20 : x
  2. Step 2: Convert to fraction form
    260,093.40/390,140.10 = 135,418.20/x
  3. Step 3: Cross multiply
    260,093.40x = 390,140.10 × 135,418.20
  4. Step 4: Simplify right side
    260,093.40x = 52,832,070,089.82
  5. Step 5: Solve for x
    x = 52,832,070,089.82/260,093.40
  6. Step 6: Final answer
    x = 203,127.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.